XSS in Basercms
CVE-2021-39136
baserCMS is an open source content management system with a focus on Japanese language support. In affected versions there is a cross-site scripting vulnerability in the file upload function of the management system of baserCMS. Users are advised to update as soon as possible. No workaround are available to mitigate this issue.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.009 (59.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Basercms
- Baserproject Basercms — versions < 4.5.1
Weakness classification (CWE)
References
- github.com/baserproject/basercms/security/advisories/GHSA-hgjr-632x-qpp3 (Third Party Advisory)
- github.com/baserproject/basercms/commit/568d4cab5ba1cdee7bbf0133c676d02a98f6d7bc (Patch, Third Party Advisory)
- basercms.net/security/JVN_14134801 (Vendor Advisory)
- jvn.jp/en/jp/JVN14134801/index.html (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2021-39136?
- CVE-2021-39136 is a high-severity vulnerability in Basercms, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2021-08-25.
- How severe is CVE-2021-39136?
- High severity. CVSS v3 base score is 8.7 out of 10.